A process, originally derived from computer language. It is a single run of activity of a program with independent functions about some collection of data. It is not only a dynamic concept, but also an active entity. This entity includes all the system resources occupied in this running program. Allergic process, I really didn’t find out that this concept originally came from the wisdom of the “medical guru”. I just think that it is a very clever, graphic and appropriate name for the concept. Allergy is not an individual disease, but a progressive process that is constantly changing, and many diseases are related to it. In the face of many diseases, such as hives, eczema, diarrhea, rhinitis, asthma and even twitching, hyperactivity, febrile convulsions, epilepsy and other diseases, we can find some allergy in them. If you don’t understand the occurrence and mechanism of allergies, you only look at these diseases in a cut-throat way. Sometimes, the disease recovery is not ideal, which is the biggest point I have gained since I studied allergy with Prof. Pengfei Xu in 2011. The universe has created our physical body, which is more sophisticated than a computer program, and it is really very difficult to read the real meaning behind each disease. What we know is just the tip of the iceberg. Allergic diseases have become a growing concern in the medical field today. Common diseases include atopic dermatitis, food allergy, allergic rhinitis, allergic asthma, etc. Symptoms are manifested in different parts of the skin, gastrointestinal tract, nasal cavity, bronchial tubes, etc. Epidemiological studies have found that the emergence of various allergic diseases shows a gradual development process from childhood eczema and food allergy to allergic rhinitis and allergic asthma, This is the medical term “allergic process”. In our clinical work, we doctors only find that the presence of atopic dermatitis with high IgE in infants or early childhood often indicates a higher chance of developing other allergic diseases in the future. But what exactly is the multiplicity rate? Why is it that some children get well with eczema and do not develop subsequent disease, while in others, the allergic process progresses and no amount of interception can stop it, and eventually asthma or worse occurs. Can we discover more predictive indices so that we doctors can all be prophets. Can we doctors become magical wizards, so that we can travel back in time to that moment when our child’s allergy was first initiated and close the factors that opened the floodgates? Maybe that moment is no longer far away. What is the allergy process in children? A little clinical observation to share with you. Allergies in children are characterized by a clear age demarcation. As children grow older, the manifestations of allergic disease change in stages. The allergic process usually begins with eczema. Eczema may be triggered by allergies from the moment the baby is first born until the age of 2 years, a time of high incidence of atopic dermatitis. The symptoms of allergy are more concentrated during this time, and the causes of allergy are also more concentrated, mostly through diet. Because babies do not have much contact with the outside world at this time and are basically fed through breast milk or formula, food allergies account for a significant portion of the problem. At almost the same time as eczema, infantile diarrhea also strikes, triggered by food allergies. The incidence of gastrointestinal allergies is not as high as that of skin diseases, reaching a peak at the age of 1 year, then gradually slowing down and remaining with the child as he or she grows. After the age of 2, children gradually become more socially exposed and have more opportunities for contact with the outside world. As the digestive and immune systems improve, food-induced skin and digestive allergies begin to decrease and inhalant allergies become more common. At this time, children begin to experience a variety of allergy-induced respiratory problems, especially after entering kindergarten, most commonly recurrent respiratory infections or rhinitis or even asthma. The child has a simple cold, eczema or rhinitis, hyperactivity, twitching, asthma, etc. Why is it allergic to you? Is there a relationship? This is the biggest problem I encounter in treating allergies today, and that is that too many parents are unaware or even ignorant of allergic diseases. It is very difficult for a pediatric allergy specialist to quickly train an “allergy illiterate” parent to understand allergies, take them seriously, and cooperate with the doctor in treating them in just a few minutes of clinic time, which is impossible. There are not many doctors around me who specialize in allergies, and since I am not a professor, I cannot lead a regular army of professionals to spread allergy knowledge with me. My personal ability is really too limited, that’s why I set up a communication platform for parents of allergic children (Haiyan Xin Yuan Weixin public platform). I am hoping that parents will help each other, so that more parents can learn about allergies through a quick way. The mechanism of allergy is much more complicated than we think, and it is not only limited to certain diseases, but also to the child’s constitution. There are many diseases that can be triggered by allergies, and behind many diseases there are actually allergies. Some children are allergic, so as they grow older, they may suffer from a variety of allergic processes, from rashes in infancy to asthma and pharyngitis as they get older. This is because the child’s constitution is allergic, and as long as he has this “allergy seed” in his body, under certain conditions or stimulated by the outside world, it may germinate and show the corresponding allergy symptoms. How to remove the seeds, in this regard, and genetic, genetic, immune and so on are related, we are still in the initial stage of understanding. There is so much that we don’t know. That’s why, in children with allergies, many diseases are not just episodes, there are allergies behind them. Food allergy is usually the first step in this process. Whether the diagnosis of the first step of the allergy process is timely and whether the treatment is appropriate can directly affect the child’s future. This is the reason why I have been following Prof. Pengfei Xu to focus on the avoidance of food and the rational and scientific diet. To be honest, what I learned from my teacher is the most basic and practical, the most grounded thing. As clinicians, we can solve some basic problems of our children as soon as possible, most certainly not something high level.